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Everything You Need to Know about Hydraulic and Pneumatic Seals

Nov 18, 2022 | Hydraulic seal | 0 comments

The automotive industry is highly sensitive to contamination. If even a single particle of dirt or dust gets into your engine, it can lead to serious problems. The lubricating properties of the oil are essential for the operation of any engine. In order to ensure that your car’s engine remains clean and contaminant-free, you will need to install a number of seals in each compartment that allows for the flow of oil and other lubricants throughout your motor’s internal workings. 

While there are many seals designed for different applications, hydraulic and pneumatic seals are commonly used for sealing purposes in some industrial settings. Both seal types have their advantages and disadvantages, but both seal types do an excellent job of protecting delicate internal mechanisms from contaminants by keeping them sealed from the outside world.

What is a Hydraulic Seal? 

A hydraulic seal is a pressure-sensitive rubber ring that is installed between the interior and exterior of a mechanism to maintain a certain pressure. When a certain pressure threshold is reached, the seal expands to create a seal between two points. The seal’s rubber material is sensitive to pressure and temperature, which is why it can be used in applications where the seal must respond quickly to changes in pressure. Hydraulic seals are designed for low-temperature environments, so they can also be used in refrigeration systems, air conditioning units, and vending machines. They are also commonly used in the oil and gas industries, where they are needed to maintain a certain pressure between two points.

What is a Pneumatic Seal? 

A pneumatic seal is a type of rubber that can withstand high-pressure environments. When a certain pressure threshold is reached, the rubber expands to create a seal between two points. It is not sensitive to pressure or temperature, so it can handle high-pressure environments. The rubber material of a pneumatic seal is not sensitive to pressure or temperature, which is why it can be used in applications where the seal must respond quickly to changes in pressure. A pneumatic seal is designed for high-temperature environments, so it can also be used in refrigeration systems, air conditioning units, and vending machines. Some pneumatic seals are designed for low-temperature applications, so they can be used in the oil and gas industries, where they are needed to maintain a certain pressure between two points.

Differences between Hydraulic and Pneumatic Seals 

Despite the similarities between these seal types, they have some notable differences. 

  1.  Application – A hydraulic seal is mostly used in low-temperature applications, while a pneumatic seal is mostly used in high-temperature environments. 
  2. Durability – A hydraulic seal is durable, but it does not withstand high temperatures. On the other hand, a pneumatic seal can withstand high temperatures, but it is not durable. 
  3. Pressure Sensitivity – A hydraulic seal is pressure sensitive and reacts quickly to changes in pressure, while a pneumatic seal is not pressured sensitive and can’t react quickly to changes in pressure.
Benefits of Using Hydraulic Seals
  • Low Maintenance Costs – Since you will not need to frequently service or change a hydraulic seal, you will be able to save significant amounts of money compared to changing pneumatic seals. 
  • Higher Efficiency – Compared to pneumatic seals, hydraulic seals are more energy efficient because they don’t require any compressed air or gas. 
  •  Less Pollution – Unlike pneumatic seals that create carbon emissions, hydraulic seals do not create any emissions, which makes them ideal for industries that require clean air. 
  • Better Noise Reduction – Unlike pneumatic seals that create noise whenever they are used, hydraulic seals are virtually silent. 
  • Longer Lifespan – Compared to pneumatic seals which often need to be replaced after only a few years, hydraulic seals have a much longer lifespan.